jquery.colorpicker: make disable field in options optional

types/jquery.colorpicker/index.d.ts

@@ -31,7 +31,7 @@ interface JQueryColorpickerOptions {
     closeOnOutside?: boolean;
     color?: string;
     colorFormat?: string;
-    disabled: boolean;
+    disabled?: boolean;
     draggable?: boolean;
     duration?: string;
     format?: string;

types/jquery.colorpicker/jquery.colorpicker-tests.ts

@@ -70,6 +70,9 @@ colorpicker.colorpicker("destroy");
 colorpicker.colorpicker("setColor", "#deadbeef");
 colorpicker.colorpicker("option", "disabled", true);
 
+// check if all options are optional
+let defaultColorpicker = $("<input type=\"text\"/>").colorpicker({});
+
 // example plugins provided
 
 $.colorpicker.parts["memory"] = function (inst) {